When you are looking, think well ahead - how will it be for you in 10 or 20 years time, when you may no longer be able to drive for all sorts of reasons.
So, close to good public transport links, both locally (buses) and to large cities (trains). You need to be within easy reach of Doctors, Pharmacies, Supermarkets, local hospital, etc.
Would you be able to get about with ease if either of you develop any sort of mobility problem (might even need to use mobility scooter).
So, nowhere with too many steps up to front door. Then obviously, to think if you can afford the area. Somewhere like Brighton or Hove is so very expensive. Lots of other places on South Coast can provide better facilities in which to settle and grow older, than Brighton - which is very much a student and young peoples city.
South West can provide a lot of desirable places, with good road, rail and air links, close to sea, warmer and better weather, etc. etc.
Having lived all my life in London suburbs, I moved here to Weston super Mare just before my 79th birthday. Yes, I do have one of my adult children living here, so had visited the town on many occasions. Good to have a look at anywhere you are thinking of going at different times of the year, particularly those that are tourist hot-spots. Ensure it still has a good atmosphere and life during other seasons. I am just so pleased I settled here just prior to this last Pandemic year occured. Love living on one level in a flat, so close to theatre, library, museum, cinemas, (when they are open), as well as High Street shops, Beach and Park. Can get to hospital either on my scooter, in my car or on bus when necessary, lovely pharmacy less than five minutes away and GP surgery within easy reach. Bus stop outside the flats, train station (with trains running to Bristol and Paddington) less than half a mile away. What could be better -and my London house sold for more than double what I paid for my roomy 2-bedroom, 2 bathroom flat.